Tried searching and found nothing... What's the best way to drain the A/C system? I'm not trying to save any of the parts. Should I just unbolt one of the connections on the low pressure line so it starts leaking then run?

 

The proper way is to take it somewhere so they can collect the freon.

 

Yeah, but the truck isn't in a driveable condition and I didn't think ahead of it

 

Well you could just remove a line and run. Don't breath any of it!

 

cut the line and let it slowly come out

 

put thick gloves and long sleeves on and press the schrader valve in with a screwdriver on the low side and hold it until it is empty

 

Haha that's what I'm thinking. Obviously low pressure side > high pressure side?

 

Cut and run in a well ventilated area.

 

yea the "Approved method" is for a shop to evacuate the system. One time I partially unbolted the the low side and let it leak out in the driveway. Where the wind could carry it away. Also put down a bunch of towels bc it will spray everywhere. Just dont breath any in.

 

Without the compressor running in a long time, the low side pressure will equal the high side pressure, so it won't matter which side you open.
The biggest problem, what you are doing is illegal.

 

Well, problem solved on all fronts. I have a buddy who is a manager at a local shop and he is willing to come and drain the freon if when I finish the project I put his shop's logo or "something amusing" on the doors of the cab for a little advertising :D

 

R134a is a HFC refrigerant that has zero ozone depletion but the EPA says it does contribute to global warming so you cant vent it.